| R/C | Regional Center |
| REC | Regional Engineering Center |
| RTAC | Regional Technical Assistance Center |
| RNOC | Regional Network Operations Center |
| RDCCG | Regional Data and Computing Center Germany Karlsruhe |
| DE-BW-01017-EG | Eismann Tiefkühl-Heimservice GmbH & Co. KG, Regional Center Süd-West Esslingen, Baden-Württemberg |
| MO | Medical Officer |
| FMC | Fresenius Medical Care |
| EMT | Emergency Medical Technician |
| CME | Continuing Medical Education |
| HMS | Harvard Medical School Boston, [MA], http://hms.harvard.edu |
| ISM | Industrial, Scientific, Medical |
| ROM | Range Of Motion [medical] |
| M.M.I. | Master of Medical Informatics Akademischer Grad |
| AMA | American Medical Association Chicago, [IL], http://www.ama-assn.org |
| MOH | Medical Officer of Health [engl.] Arzt beim Militär |
| ESMS | European Society of Medical Sociology |
| MEDARS | Medical Access and Retrieval System |
| MAB | Medical Advisory Board [engl.] Medizinischer Beratungsstab |
| BMA | British Medical Association [engl.] Britische Ärztevereinigung |
| GEMS | General Electric Medical Systems |
| BMDP | Bio - Medical Data Processing [engl.] Bio-medizinische Datenverarbeitung |
| ACMT | American College of Medical Technologists [engl.] Amerikanische Gesellschaft für medizinische Technik |
| MEDLINE | Medical Literature Analysis and Retrieval System |
| AMS | Advanced Medical Services GmbH [engl.] Mannheim |
| RM | Regional Manager |
| RTB | Regional Test Bed |
| VRF | Vogtland Regional Fernsehen |
| RPC | Regional Playback Control |
| ROC | Regional Operating Company |
| SMA | Sowjetische Militäradministration [regional] , [DDR] |
| RIR | Regional Internet Registry |
| brtb | Berlin Regional Test Bed |
| RIR | Regional Internet Registries |
| RTM | Regional Telecommunications Management |
| DRE | Deutsche Regional-Eisenbahn |
| SRL | Vereinigung für Stadt-, Regional- und Landesplanung e.V. |
| RBOC | Regional Bell Operating Company |
| RBHC | Regional Bell Holding Company |
| RQSM | Regional Quality Service Management |
| DFW | Dallas-Ft.Worth [regional airport] |
| RHC | Regional [Bell] Holding Company |
| RIPP | Regional Industrial Property Programme Regionalprogramm für gewerbliche Eigentumsrechte |
| Reg. Environ. Change | Regional Environmental Change [hat ein eigenes Review] Zeitschrift |
| BARTS | Bell Atlantic Regional Timesharing [engl.] Firmenbezeichnung |
| VM | Regional [IATA-Airline-Code / Frankreich] |
| BARRNET | Bay Area Regional Research Network [engl.] |
| STAR | Special Telecommunication Action for Regional Development EU-Strukturhilfsprogramm |
| QP | Regional Air [IATA-Airline-Code / Kenya] |
| YS | Regional [IATA-Airline-Code / Frankreich] |